Audio Delay in all content

So my AppleTV seems to have spontaneously developed a problem of not playing audio in sync with the video. This is true of all videos, whether they're files I encoded, itunes-purchases or even movie trailers and youtube. I've even done a factory restore, with no luck. I also get the feeling that the menu sounds are delayed.

So it turns out it was my TV and the HDMI for some strange reason. I switched to component, and it worked, switched back to HDMI, still delayed. I then turned off the TV and back on, and all was well now. Still not sure of the cause, but at least I know how to fix it. Panic averted

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